<template>
  <div class="swiper-container" ref="mySwiper">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="img in imageList" :key="img.id">
        <img :src="img.imgUrl"
          :class="{active:img.id===imgId}"
          @click="changeImage(img.imgUrl,img.id)"
         />
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
import { mapGetters } from "vuex";
import "swiper/swiper-bundle.min.css";
import Swiper from "swiper/swiper-bundle.min.js";
export default {
  name: "ImageList",
  data(){
    return {
      imgId:0
    }
  },
  computed: {
    ...mapGetters(["skuInfo"]),
    imageList() {
      return this.skuInfo.skuImageList ? this.skuInfo.skuImageList : [];
    },
  },
  methods:{
    changeImage(url,id){
      this.imgId = id
      this.$emit("changeImg",url)
    }
  },
  watch: {
    imageList: {
      handler() {
        this.$nextTick(()=>{
            //轮播
            new Swiper (this.$refs.mySwiper, {
              // 如果需要分页器
              pagination: {
                el: '.swiper-pagination',
              },
              // 如果需要前进后退按钮
              navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
              },

              //设置slider容器能够同时显示的slides数量
              slidesPerView : 3,
              //设置每次滑动几张图片
              slidesPerGroup: 3,
            })
          })
      },
      immediate: true,
      deep: true,
    },
  },
};
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }

      &:hover {
        border: 2px solid #f60;
        padding: 1px;
      }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;
    &::after {
      font-size: 12px;
    }
  }
}
</style>